/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.druid.segment;

import org.apache.druid.segment.vector.MultiValueDimensionVectorSelector;
import org.apache.druid.segment.vector.SingleValueDimensionVectorSelector;
import org.apache.druid.segment.vector.VectorValueSelector;

/**
 * Class that encapsulates knowledge about how to create vector column processors. Used by
 * {@link DimensionHandlerUtils#makeVectorProcessor}.
 *
 * Unlike {@link ColumnProcessorFactory}, this interface does not have a "defaultType" method. The default type is
 * always implicitly STRING. It also does not have a "makeComplexProcessor" method; instead, complex-typed columns
 * are fed into "makeSingleValueDimensionProcessor". This behavior may change in the future to better align
 * with {@link ColumnProcessorFactory}.
 *
 * @see ColumnProcessorFactory the non-vectorized version
 */
public interface VectorColumnProcessorFactory<T>
{
  T makeSingleValueDimensionProcessor(SingleValueDimensionVectorSelector selector);

  T makeMultiValueDimensionProcessor(MultiValueDimensionVectorSelector selector);

  T makeFloatProcessor(VectorValueSelector selector);

  T makeDoubleProcessor(VectorValueSelector selector);

  T makeLongProcessor(VectorValueSelector selector);
}
